Piezoelectric Energy Harvester Based on LiNbO3 Thin Films

This paper reports the results of the influence of the energy of laser pulses during laser ablation on the morphology and electro-physical properties of LiNbO3 nanocrystalline films. It is found that increasing laser pulse energy from 180 to 220 mJ results in the concentration of charge carriers in...

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Bibliographic Details
Published in:Materials 2020-09, Vol.13 (18), p.3984
Main Authors: Vakulov, Zakhar, Geldash, Andrey, Khakhulin, Daniil, Il’ina, Marina V., Il’in, Oleg I., Klimin, Viktor S., Dzhuplin, Vladimir N., Konoplev, Boris G., He, Zhubing, Ageev, Oleg A.
Format: Article
Language:English
Subjects:
Carbon
Carbon nanotubes
Carrier density
Chemical vapor deposition
Converters
Current carriers
Deformation
Efficiency
Electric power generation
Electricity distribution
Energy
Energy harvesting
Ferroelectricity
Laser ablation
Lasers
Lead free
Lithium niobates
Microscopy
Morphology
Nanogenerators
Parameter estimation
Physical properties
Piezoelectricity
Plasma
Strain gauges
Thin films
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Summary:This paper reports the results of the influence of the energy of laser pulses during laser ablation on the morphology and electro-physical properties of LiNbO3 nanocrystalline films. It is found that increasing laser pulse energy from 180 to 220 mJ results in the concentration of charge carriers in LiNbO3 films decreasing from 8.6 × 1015 to 1.0 × 1013 cm−3, with the mobility of charge carriers increasing from 0.43 to 17.4 cm2/(V·s). In addition, experimental studies of sublayer material effects on the geometric parameters of carbon nanotubes (CNTs) are performed. It is found that the material of the lower electrode has a significant effect on the formation of CNTs. CNTs obtained at the same growth time on a sample with a Cr sublayer have a smaller diameter and a longer length compared to samples with a V sublayer. Based on the obtained results, the architecture of the energy nanogenerator is proposed. The current generated by the nanogenerator is 18 nA under mechanical stress of 600 nN. The obtained piezoelectric nanogenerator parameters are used to estimate the parameters of the hybrid-carbon-nanostructures-based piezoelectric energy converter. Obtained results are promising for the development of efficient energy converters for alternative energy devices based on lead-free ferroelectric films.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma13183984